The steam turbine DEH system requires rapid response to valve adjustment commands. For example, when the unit load changes, the DEH needs to issue commands quickly to control the valve opening and adjust the steam flow. This requires the position sensor's frequency response to keep up with the command speed and provide lag-free valve position feedback. The FRD.WJA2.308 position sensor fully meets this requirement through optimized structural design and signal processing.

 

In terms of frequency response performance, the FRD.WJA2.308 position sensor utilizes the non-contact LVDT principle. The core and coil have no mechanical friction, eliminating the response delay caused by mechanical transmission. Furthermore, the optimized coil winding process and signal demodulation circuitry enable rapid detection of minute core displacement changes. Its frequency response range covers the DEH system's adjustment frequency requirements. Even with high-frequency, small-amplitude adjustment commands from the DEH, the sensor can output an electrical signal corresponding to the valve opening in real time, eliminating signal lag due to insufficient frequency response.

 

The FRD.WJA2.308 displacement sensor outputs signals in standard analog or digital form, enabling direct and quick integration with the DEH controller without complex signal conversion, further reducing transmission delays. In actual operation, if the sensor's frequency response fails to match the DEH's adjustment speed, valve position feedback can lag behind actual throttle movement. The DEH may mistakenly believe the throttle is not in position and continue issuing adjustment commands, causing throttle overshoot or oscillation, impacting unit load stability and steam parameter control accuracy. The FRD.WJA2.308 displacement sensor's frequency response design addresses this issue, ensuring that the feedback signal is synchronized with the actual throttle opening, providing accurate real-time data to the DEH control loop and ensuring the stability and accuracy of throttle adjustment.

 

 

YOYIK is located in Deyang, Sichuan Province, China. It is a well-known equipment and parts manufacturer in the power industry, focusing on the supply of parts for steam turbines, generators and hydroelectric generator sets. The company adheres to the principle of "technological innovation, quality first", adopts advanced production equipment and strict quality control system to provide high-quality products that meet international standards to global customers. YOYIK not only provides products, but also provides professional and comprehensive solutions for industries such as power, metallurgy, and chemical industry, helping customers improve equipment performance and optimize operating costs.

 

Yoyik can offer many spare parts for power plants as below:

 

#DF-Displacement sensor FRD.WJA2.308-DF

LVDT transmitter XCBSQ-01/500-01-01

Control system LVDT A191.36.09.03

Signal transmitter CZTD-3A-250T

6W Wall mount speaker L-PWP06A

Eddy Current Sensor PR6424/101-100

Annunciator CJX-14

AC current transducer , accuracy level 0.2; Output 4-20mA; 220V; 50HZ; Input O~1A DBS/Q-111

Sensor DF310580-50-07-02

Displacement transmitter LTM-3S-B

MODULE KN831E

magnetic linear position sensor DET200

Eddy Current Sensor PR6426/010-131

Bolt electric heating rod ZJ-20-8B

Visible light transmitter ZSM-3

LVDT Sensor HL-6-250-6

Control system LVDT 3000TDGNK

magnetic pick up sensor ZS-03 L=80

Electric heating control cabinet DJZ-06

Communicate cable RVVP 4*0.3mm2

Rtd Turbine Bearing 3-Wire Pt100 WZP2-014s PT100 2M

WUCHUN AP TRANSMITTER TM302-A00-B02-C00-D00-E00

pt100 type k TC03A2-KY-2B/S12

Visible light processor LYHJK-Q

Hand operated device NPDF-Q21FD3

VOLTMETER 6C2-V

sensor CS-1-G-065-02-01

ELECTRODE DJY 2612-115

Sensor DF310880-50-10-01

Eddy Current Sensor PR6422/001-001

thermocouple for high temperature measurement TC03A2-KY-2B/S17

pressure transmitter 40HAG10CL105+266DSHFHSA2A7 LSB1

Eddy Current Sensor PR6422/003-111

Bolt electric heating rod ZJ-20-22

Thyristor NFP-KC5

Exciter GDI Card 3BHB006338R0001

pressure switch in hydraulic system 6NN-K3-N4-F1A

Power supply PSMB-8-8-24V/120W

Displacement sensor FRD.WJA2.308

 

LVDT Sensor 2000TDGN-15-01

AMMETER 6L2-A

ac proximity switch PR6424/010-140

Triple probe KR939SB3

LVDT actuator travel sensor 20000TDGN

Timer JORC

Digital Meter DM-3

lvdt measurement systems TDZ-1-50

Turbine bolt electric heating rod ZJ-20-T21

LVDT Sensor 4000XS-4095

TRANSMITTER AWT420.A.1.A1.C2.Y0.Y0.E511072

Power supply module 857833

Sensor DF311180-50-09-00

EH OIL PRESSURE HIGH 396049-WC103D

Electrical actuator with motor ZHB800-25

SENSOR VIBRASI ACCELEROMETER VERTICALBEARING FAN ZS-01 L=65

AC Voltage transducer S3-VD-3-15A40

precision displacement sensor HL-6-300-15

Intermediate relay UEG/A-1H/12VDC

Oil temperature sensor YT315D M16 * 1.5

INTELLIGENT REVERSE ROTATING SPEED MONITORING DEVICE JM-C-337

linear variable displacement transducer lvdt TDZ-1D-03

DC Signal Isolator (GLG) XGL-W6

Temperature Controller XMT604B

S-type thermocouple NKWRN-431-S

temposonics transducer DET400B

LVDT Transmitter LTM-6A

VOLTMETER 6L2-V

Local alarm device differential pressure indicator PHV2BVN

rpm indicator with sensor DF9011

CARD MKVIE CONTROLLER MODULE IS220UCSAH1A

DC contactor CZ0-400/20TH

Blind-free two-color water meter B69H-32/2-W

Double Platinum RTD WZPT2 –31

pressure measuring machine BH-053003-053\500~4000PSI

eddy current proximity probe CWY-DO-810802

Differential Pressure Controller RC0113CZ084H

Displacement sensor FRD.WJA2.308

 

DFYLMY-2025-9-26-A